CN1023191C - Process for producing sustained release ibuprofen preparation - Google Patents
Process for producing sustained release ibuprofen preparation Download PDFInfo
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- CN1023191C CN1023191C CN86108644A CN86108644A CN1023191C CN 1023191 C CN1023191 C CN 1023191C CN 86108644 A CN86108644 A CN 86108644A CN 86108644 A CN86108644 A CN 86108644A CN 1023191 C CN1023191 C CN 1023191C
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- Prior art keywords
- tablet
- ibuprofen
- microsphere
- mixture
- cellulose
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- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229960001680 ibuprofen Drugs 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 22
- 238000002360 preparation method Methods 0.000 title claims description 8
- 238000013268 sustained release Methods 0.000 title description 2
- 239000012730 sustained-release form Substances 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 239000004005 microsphere Substances 0.000 claims abstract description 21
- 239000001913 cellulose Substances 0.000 claims abstract description 13
- 229920002678 cellulose Polymers 0.000 claims abstract description 13
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 11
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 11
- 238000012946 outsourcing Methods 0.000 claims description 14
- 210000000234 capsid Anatomy 0.000 claims description 12
- 235000010980 cellulose Nutrition 0.000 claims description 11
- 239000007767 bonding agent Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 6
- 239000008107 starch Substances 0.000 claims description 6
- 235000019698 starch Nutrition 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000012736 aqueous medium Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- 229920003148 Eudragit® E polymer Polymers 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 2
- 241001597008 Nomeidae Species 0.000 claims description 2
- NEDGUIRITORSKL-UHFFFAOYSA-N butyl 2-methylprop-2-enoate;2-(dimethylamino)ethyl 2-methylprop-2-enoate;methyl 2-methylprop-2-enoate Chemical compound COC(=O)C(C)=C.CCCCOC(=O)C(C)=C.CN(C)CCOC(=O)C(C)=C NEDGUIRITORSKL-UHFFFAOYSA-N 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000001814 pectin Substances 0.000 claims description 2
- 235000010987 pectin Nutrition 0.000 claims description 2
- 229920001277 pectin Polymers 0.000 claims description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims 1
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims 1
- 239000008108 microcrystalline cellulose Substances 0.000 claims 1
- 229940016286 microcrystalline cellulose Drugs 0.000 claims 1
- 230000001225 therapeutic effect Effects 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 abstract 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000007884 disintegrant Substances 0.000 abstract 1
- 239000004922 lacquer Substances 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 24
- 239000002775 capsule Substances 0.000 description 10
- 230000003203 everyday effect Effects 0.000 description 6
- 230000036470 plasma concentration Effects 0.000 description 6
- 210000002381 plasma Anatomy 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 238000001727 in vivo Methods 0.000 description 4
- 230000002045 lasting effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000857 drug effect Effects 0.000 description 3
- 239000010248 fenbid Substances 0.000 description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 210000002784 stomach Anatomy 0.000 description 3
- -1 2-ethylidene diester Chemical class 0.000 description 2
- 230000003110 anti-inflammatory effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- AEMRFAOFKBGASW-UHFFFAOYSA-M Glycolate Chemical compound OCC([O-])=O AEMRFAOFKBGASW-UHFFFAOYSA-M 0.000 description 1
- 241000167880 Hirundinidae Species 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 206010066901 Treatment failure Diseases 0.000 description 1
- 238000006887 Ullmann reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013270 controlled release Methods 0.000 description 1
- 229950003988 decil Drugs 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 210000001951 dura mater Anatomy 0.000 description 1
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 210000004051 gastric juice Anatomy 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229940071826 hydroxyethyl cellulose Drugs 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 230000000144 pharmacologic effect Effects 0.000 description 1
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 206010039073 rheumatoid arthritis Diseases 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229940071117 starch glycolate Drugs 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
- A61K9/2077—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets
- A61K9/2081—Tablets comprising drug-containing microparticles in a substantial amount of supporting matrix; Multiparticulate tablets with microcapsules or coated microparticles according to A61K9/50
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/04—Centrally acting analgesics, e.g. opioids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
Landscapes
- Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Organic Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pain & Pain Management (AREA)
- Rheumatology (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Medicinal Preparation (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Control Of El Displays (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
The product consists of tablets which contain at least 600 mg of ibuprofen and a binder, or a mixture of binders, based on cellulose and cellulose derivatives in the form of microspheres which are coated with an acrylic resin of defined nature and are compressed together with a disintegrant; the tablets are preferably also coated with a lacquer layer. As a consequence of the high content of active compound and its delayed release in the body, the therapeutic treatment with ibuprofen can be reduced to a minimum number of intakes and dose units per day.
Description
Known 2-(4-isobutyl phenenyl) propanoic acid claims ibuprofen again, because it has good pain relieving and antiinflammatory performance, therefore is widely used in the treatment of slight state to relax its pain.Be used for the rheumatism in non-joint and be used for inflammation and disorder of joint degeneration, the antiinflammatory goods of ibuprofen and other on-steroidals are compared, and especially the toleration to stomach demonstrates fabulous characteristic.
Recommended doses to Rheumatoid arthritis and osteoarthritis treatment is the 900-1600 mg/day especially, (L.S.Goodman and A.Gilman, The pharmacological Basis of Therapeutics, 5th Edition, MacMillan Publ.Co., New York, 1975, page 343).Basic document according to Arzneimittel-Profile/Basisinformation nber arzneiliche Wirkstoffe(medicine profile/pharmaceutical active compounds) (Govi-Verlag GmbH und Pharmazeutischer Verlag, Frankfurt a/Main(FRG), 2nd supplement, November 1983, ibuprofen) every day dosage be the 1200-1600 milligram; Under isolated situation, can increase to 2,400 mg/day, but should not increase to this more than dosage.
Have doubt ground to use this high dose to be because this pharmaceutical active compounds can be promptly, fully excreted out from human body: this high dose believable is owing to be excluded fully in 24 hours after ibuprofen and the metabolite administration in the end thereof.
What this got rid of rapidly is reliable on the other hand, in order to ensure the valid density that pharmaceutical active compounds is arranged in the human body, clear and definite concentration is arranged in blood plasma, can repeat to take ibuprofen in several hours at interval by one day, for example, adult's dosage one day three times, be 1-2 * 200 milligram tablet, one day 3-4 time, dosage is 1 * 400 milligram of tablet, or every 4-6 hour 400 milligrams.
With such picked-up number of times, one day, sb.'s illness took a turn for the worse may to make patient, patient is caused medicine detest sense, cause the treatment failure, in addition, the often picked-up repeatedly of reactive compound amount, can surpass effective blood standard for certain, thereby increase the risk of pair effect, especially in gastrointestinal tract.
For this reason, people's expectation obtains containing the patent medicine form that is higher than about 300-400 milligram reactive compound and can discharge the patent medicine form of its content in over a long time, so just might reduce the number of times and the dosage units of picked-up every day, also almost can suppress the fluctuation of blood standard simultaneously, up to the present, the very high of ibuprofen and very the fluctuation between the low concentration be inevitably (fluctuation standard).
In fact, with regard to the above-mentioned meaning of mentioning, many suggestions had been proposed, for example, at DE 2,908,794 and Japan Patent 81-30, just narrate ibuprofen and other physiologically active compounds among the 402A and continued the solid preparation that discharges; In above-mentioned preparation, reactive compound is to be embedded into to be dissolved in gastric juice or only to be dissolved in the polymeric matrix in the intestinal juice, they are to resemble di-1 with gamma-rays suitable radiation method, reactive compound aqueous dispersion system and one or more, 2-ethylidene diester or di triglyceride are in the temperature below 0 ℃, more fortunately-20 and between-80 ℃, obtain by polymerization, the preparation of acquisition is shaped to microsphere or dura mater.
According to BE 903,540, reactive compound by any kind of and any activity, especially by ibuprofen and by analog such as glucide, agedoite produce the medicated powder that continue to discharge, for reaching this purpose, in nontoxic polymer, to remove and desolvate or dispersant, for example fiber derivative, polyacrylic acid and polymethacrylate derivative, polyvinyl, polysiloxanes, polyurethane or the like from the solution of this reactive compound or decentralized photo; So just can obtain microsphere.
Yet, said method, obviously also lack the application of technology up to now, this failure at first belongs to sizable cost of equipment and other difficulties, these difficulties comprise brings out reaction and polymeric temperature will be controlled at-20 to-80 ℃, or removes from solution and will reach indivisible when desolvating, really, will produce in force according to this method and to have high-load ibuprofen solid preparation, all these difficulties all are insurmountable.
However, the pharmaceutical preparation of in check lasting release also comes out, such as, especially good Dolgit
Retard or Novogent
N(Rote Liste, Editio Cantor, Aulendorf/FRG 1984), in these preparations, ibuprofen is with capsular form, contains 400 and 300 milligrams respectively, usually, take twice every day, each 2 capsules, every day, accumulated dose can reach 6 capsules.In addition, European Patent Application No. 61,217 have narrated the medicine with this reactive compound of delay release, it is made up of the hard gelatine capsule that contains 300 milligrams of ibuprofens, according to dosiology, advise taking twice in one day, per 12 hours clothes once, each two capsules are produced in coating pan, and are intracardiac in the sphere of being made up of sugar and starch, with the bonding powdered ibuprofen of low viscosity polyvinylpyrrolidone, and then, the polyvinylpyrrolidone capsid of spheroplast's outsourcing high viscosity wraps up last spheroplast's dress again.
As people known to general, maximum capsule-the standard size that can buy on the market is 0 or 00, capacity as for spheroplast or piller, great majority are equivalent to 350 milligrams of reactive compounds, for this reason, above-mentioned therapeutic scheme is necessary, though it must not satisfy beginning time institute's requirement, and this method wants time taking outsourcing stickum capsid and steaming desolventizes and repetitive operation will cause sizable implementation cost.
Though these medicines have desired in check lasting release action, but they can not reach the purpose of the scope of dosage unit (300 or 400 milligrams) standard, it is identical with the dosage in the common tablet, can not make intake obtain desired reduction.
On the other hand, for example attempting to produce the in check release medicine that contains 600-800 milligram reactive compound fails, in fact, ibuprofen has low fusing point (75-77 ℃), and it can further reduce its fusing point during with commonly used mixed with excipients, therefore, pressure during the film-making agent just is enough to make the fusing of part reactive compound, this just makes solid composite bonding, stoped making of tablet widely, this situation has deleterious effects especially to producing in check release medicine, according to Japan Patent 84-122,425A, these medicines usually contain fat composition or are similar to liquid low melting point kicker, such as hydrogenated oil and fat or paraffin.
Therefore, although all attempt all failing to provide a kind of medicinal forms of ibuprofen so far because the high-load of reactive compound and it discharges in the intravital delay of people, make take medicine one day twice can only a unit.
The medicine of ibuprofen high-load high dose surprisingly so far, have been found that now but can be in the longer time in human body release of active compounds regularly, the result has finally satisfied the requirement that was long ago proposed.
This medicine is the form with tablet, and it contains pharmaceutical active compounds in microsphere, disintegrate promptly in aqueous medium, and it contains following each compositions:
A) at least 600 milligrams of the content of ibuprofen and
B) be the bonding agent of substrate or the mixture of various bonding agent with cellulose and cellulose derivative, two kinds all is form of mixtures and the microsphere form with homogeneous, is wrapped one deck capsid successively.
C) neutral acrylic resin, its mean molecule quantity are 800,000, form by the copolymer of the acrylic acid of following partial structural formula and methacrylate,
Wherein R and R ' represent hydrogen or methyl separately,
R " and R " ' separately represents methyl or ethyl, or a kind of acrylic resin of similarity, and the microsphere of outsourcing capsid equably with following d) material mixes,
D) a kind of disintegrating agent, or several disintegrating agent, and be compressed the formation tablet.
According to tablet of the present invention is moistening by being that the mixture of the bonding agent of substrate or bonding agent mixes the mixture and the water that obtain homogeneous ibuprofen with the cellulose derivative, make mixture become microsphere by extruding, dry this microsphere, come outsourcing microsphere capsid with the aqueous solution decentralized photo of acrylic resin as defined above, and it is dry, microsphere and a kind of disintegrating agent of outsourcing capsid, or a kind of mixture of various disintegrating agents mixes, obtain the mixture of homogeneous, and mixture is compressed into tablet makes.
In implementing preferably, tablet outsourcing one deck polishing layer.
Shi Yi bonding agent is cellulose and water soluble dyes derivant especially, such as methylcellulose, ethyl cellulose, carboxymethyl cellulose (being also referred to as the cellulose glycolate), hydroxyethyl-cellulose, hydroxypropyl cellulose, the cellulose ethane sulfonic acid, in this respect, also can consult Ullmanns Encyklopadie der technischen Chemie(Ullmann's encyclopedia of industrial chemistry), 4th edition, volume 9 pages 192-212, Verlag Chemie GmbH, Weinheim(FRG) 1975.
Be suitable for the object of the invention, many acrylic resins with above-mentioned character are according to its trade name Eudragit E 30 D(Rohm Pharma GmbH, Darmstadt, FRG) can buy on market, it is very detailed that its character has illustrated.
The disintegrating agent that can adopt is especially good polyvinylpyrrolidone, starch, starch ether, carboxymethyl starch (having another name called the starch glycolate), pectin and other common swellers, for example cellulose etc.
Can contain ibuprofen content according to tablet of the present invention up to the 600-1200 milligram, or even higher content, really, this content does not depend on the volume and little volume as a commercial capsule of wishing that patient swallows to multipotency, and only depends on the form and the dimension of tablet machine perforator.
Example
The tablet for preparing following compositions
Example 1 example 2 examples 3
Acrylic resin
Decil first acrylate-
Methyl first acrylate copolymer
E 30 D （3）53.0 ″ 53.3 ″ 40.0 ″
Example (continuing)
Example 1 example 2 examples 3
1270 milligrams 1305 milligrams 979 milligrams
(1) manufacturer: FMC Corporation, Chicago(IL, the U.S.)
(2) manufacturer: Shin-Etsu Chemical Co., Cellulose Div., Tokyo(Japan)
(3) manufacturer: Rohm Pharma CmbH, Darmstadt(FRG)
(4) manufacturer: Degussa AC, Frankfurt a/Main(FRG)
(5) manufacturer: GAF Corporation, Wayne(NJ, the U.S.)
(6) manufacturer: AVEBE International Marketing and Sales, Foxhol(Holland)
The various materials that will be called A mix, the aqueous solution of water or bonding agent is moistening, by extruder and group's nodulizer (making conglobate machine), make moistening mixture make the microsphere shape, then be allowed to condition in about 45 ℃ air vapor dry, the exsiccant microsphere water slurry capsid of bed process at about 30 ℃ of specified acrylic resins of following outsourcing, afterwards, use mixing arrangement, with the microsphere of outsourcing capsid with mix mutually according to the listed material of B, the mixture that obtains is compressed into tablet, then preferably tablet is used coating pan outsourcing one deck polishing layer.
Measure the rate of dissolution of tablet in water produced by following method as measuring example 1,2 and 3:
Method: American Pharmacopeia XXI, the 1243rd page (1985)
Device: device 1, with the rotation hanging basket of per minute 150 commentaries on classics
Medium: water-bearing phosphate salt buffer, PH6.5
Volume: 900 milliliters
The volume of sample: 1 milliliter
Sample time: 30, after 60,120,180,240,300,360 and 420 minutes
Measure: utilize spectrographic technique, at 221 millimicrons of ultraviolet places
In temporal sequence, measurement result shows the amount (method) of the following proportional ibuprofen that is discharged by tablet,
Example 1 example 2 and 3
After 1 hour 21.6% 27.6%
After 2 hours 37.8% 42.8%
After 4 hours 61.9% 64.4%
After 7 hours 80.5% 76.8%
After 10 hours 99.7% 94.0%
In other words, according to the present invention, in water-bearing media, in about 10 hours, the reactive compound in the tablet is actually quantitatively and discharges.In addition, from the time sequencing process that discharges, obviously rapid decomposition of tablet and release are carried out regularly, for this reason, the reactive compound level can improve in the blood that effectively continues to discharge in human body, and this is being confirmed in clinical trial after picked-up soon.
In order to check the drug effect of this medicine, can carry out twice independent test in vivo measures its bioavailability and compares with the bioavailability of other medicinal ingredients of ibuprofen, by IPHAR, Institut f ü r Klinische Pharmakologie GmbH, H
Henkirchen(FRG) carried out above-mentioned in vivo test on one's body at 5 and 8 healthy male volunteers respectively in August, 1984, JIUYUE, October, November and December.
The medicine of following in check lasting release is used to the comparison of in vivo test for the first time:
(A) Novogent
N, 300 milligrams of capsules
Manufacturer: Temmler-Werke, Vereinigte Chemische
Fabriken，Marburg（FRG）
(B) Dolgit
Postpone 400 milligrams of capsules
Manufacturer: Dolorgiet Arzneimittelfabrik Peter Doll KG, Bonn(FRG)
(C) the NC Nitroncellulose tablet in 031,600 milligram of example 3 of MP
(according to the present invention)
With the medicine of no delay action, i.e. (D) Brufen, the tablet of 400 milligrams of outsourcing capsids
Manufacturer: Adolf Klinge u.Co., Munich(FRG).
In each case, each the test volunteer who is accepted, one-period interval, once oral 400 milligrams of Dolgit postpone the dosage or the Brufen(D of (B)) and 600 milligrams of NovogentN(2 * 300 milligram capsules, A) or the tablet (C) of 600 milligrams of MPO31 NC Nitroncellulose.
The medicine of following in check lasting release is used to the comparison of in vivo test for the second time:
MP 031,600 milligrams of nitrocellulose tablets in the example 3
(according to the present invention)
MP 031 ', 800 milligrams of NC Nitroncellulose tablets in the example 1.
(according to the present invention)
Fenbid
Postpone 300 milligrams of capsules
Manufacturer: Smith, Kline and French Laboratories Ltd., Welwyn Garden City(Hertfordshire, England)
With the above-mentioned medicine Brufen that does not have delay action, the tablet of 400 milligrams of outsourcing capsids.
Manufacturer: Adolf Klinge u.Co., Munich(FRG).
In each case, each of eight test volunteers that accepted, at week age at interval, an oral dose is 600 milligrams of MP 031,800 milligrams of MP 031 ', 600 milligrams of Fenbid postpone the tablet of (2 * 300 milligrams of capsules) or 800 milligrams of Brufen(2 * 400 milligram outsourcing capsids).
According to a cover technical process, take out blood sample on one's body from each test volunteer, and therefrom obtain the concentration that blood plasma is used to analyze ibuprofen, this mensuration is according to S.F.Lockwood and J.C.Wagner (chromatography magazine 232(1982), 335-343) method is undertaken by the high-pressure liquid phase chromatography.
Following respectively to show each listed parameter be by in the different time, and the ibuprofen concentration of measuring in blood plasma is calculated:
Cmax: Cmax
Reach the time of Cmax: tmax
Area below concentration curve: Auc
On average hold time: MRT and
Discharge the half-life, t
1/2
Table 1
The test volunteer
Parameter 12345 xSD
Cmax 5.30 15.17 13.36 9.73 13.95 11.95 4.49
tmax 2.5 6.0 2.5 3.0 2.5 3.4 1.8
A AUC 56.38 134.23 140.36 93.15 127.70 114.67 39.20
MRT 8.82 8.16 10.60 9.65 9.83 9.35 1.08
t
1/28.36 5.77 6.27 5.11 5.35 6.44 1.34
Cmax 10.86 16.14 17.07 10.42 7.06 12.78 4.69
tmax 4.0 4.0 2.5 2.5 12.0 5.6 4.3
B AUC 66.00 108.35 133.49 65.81 115.04 105.72 28.53
MRT 6.07 5.61 6.94 5.37 14.14 8.19 4.00
t
1/22.21 2.30 3.65 2.96 2.72 0.81
Cmax 3.71 23.11 25.92 - 12.25 16.25 10.23
tmax 4.0 4.0 3.0 - 4.0 3.8 0.5
C AUC 27.05 142.24 198.84 - 157.46 131.40 73.56
MRT 6.79 6.31 7.53 - 10.89 7.88 2.07
t
1/23.52 2.45 4.48 - 3.56 3.50 0.83
Cmax 4.34 37.05 37.89 27.33 12.07 22.84 17.19
tmax 1.5 0.8 1.5 1.5 8.0 2.9 3.4
D AUC 13.54 92.47 140.07 76.47 131.22 94.32 57.69
MRT 2.69 2.43 4.04 3.21 9.11 4.57 3.11
t
1/21.65 1.57 2.11 1.64 3.99 2.33 1.13
(table 1 explanation)
Five oral Novogent N(A of healthy test volunteer, 600 milligrams), Dolgit postpones (B, 400 milligrams), MP 031(C, 600 milligrams) and Brufen(D, the ibuprofen pharmacokinetic parameter of being measured after 400 milligrams.
C
Max=maximal plasma concentration (mcg/ml)
t
Max=reach maximal plasma concentration time (hour)
Area under the AUC=blood plasma standard curve (mcg/ml hour)
MRT=on average hold time (hour)
t
1/2=discharge the half-life (hour)
The x=meansigma methods
The SD=standard error
(table 2 explanation)
Eight healthy test volunteer oral MP 031(600mg), MP 031 ' (800mg), and Fenbid postpones (600mg) and Brufen(800mg) the back ibuprofen pharmacokinetic parameter of being measured.
C
Max=maximal plasma concentration (mcg/ml)
t
Max=reach maximal plasma concentration time (hour)
Area under the AUC=blood plasma standard curve (mcg/ml hour)
MRT=on average hold time (hour)
t
1/2=discharge the half-life (hour)
The x=meansigma methods
The SD=standard error
Between the time graph of the plasma concentration of the various medicament forms of taking evident difference is arranged, Brufen(D) contain the plasma concentration (C of high maximum
Max) and the shortest time reach Cmax (t
Max), (MRT) and half-life (t on average hold time
1/2) minimum, to be released into branch desired for non-controlled just.
Reference area under concentration curve (AUC) is represented the bioavailability of various compositions, obviously from table 1 according to medicine of the present invention (C) bioavailability maximum, its AUC is 131.40, undoubtedly this high level and its delay release combination by pharmaceutical active compounds obtains, according to table 1, in controlled release composition, medicine MP 031 of the present invention and MP 031 ' have the highest AUC equally, difference 170.67 and 213.14 that is to say maximum bioavailability.
Yet; there is conclusive advantage to be; the invention provides a kind of release of keeping; unit dose with long-term drug effect; at least being higher than so far, the medicine of 2-3 reactive compound content doubly is possible; yet; people do not expect that fully only the foreign minister of 10-15% (promptly being labeled as the material of B in embodiment 1-3 as a whole) being added the microsphere physical ability makes producing of tablet become possibility; though; these tablets contain 600 milligrams ibuprofen or even more; but it is not too large; just can accept (can swallow), they are at the decomposition in aqueous medium fast as any common tablet (i.e. the various tablets of producing by compressed granulate or powder).
By decomposing the microsphere that discharges under one's belt, in some sense, continuously " stream " advances in the stomach, it drains irrelevant with the periodicity of stomach to a great extent, microsphere flow shows that during whole passage it postpones release action, owing to can see the drug effect that it is outstanding significantly from bioavailability, therefore provide a kind of to medical science and successfully made above-mentioned treatment become possible medicine, this medicine is shown to patient with minimum required amount (absorbing the dosage unit number of number of times and each picked-up or picked-up every day every day).
Claims (6)
1, a kind of method that continues to discharge ibuprofen preparation of producing, comprising the ibuprofen that is equivalent at least 600 milligrams of content of every tablet with a kind of only to be with cellulose and cellulose derivative that the bonding agent of substrate or bonding agent mixture mix the mixture and the water that obtain a kind of homogeneous moistening, make mixture be configured as microsphere by extruding, dry this microsphere, only the aqueous dispersions with neutral acrylic resin carries out coating, its mean molecule quantity of described acrylic resin is about 800,000, form by the acrylic acid of following partial structural formula and the copolymer of methacrylate
Wherein: R and R ' represent hydrogen or methyl separately,
R " and R " ' separately represents methyl or ethyl, or a kind of acrylic resin of similarity, and it is dry, with the microsphere of outsourcing capsid and 15% or still less a kind of disintegrating agent, or a kind of mixture of various disintegrating agents mixes, obtain a kind of mixture of homogeneous and compress this mixture forming tablet, this tablet contains reactive compound and the disintegrate rapidly in aqueous medium of above-mentioned microsphere at microsphere.
2, method according to claim 1, wherein the tablet that is generated also outsourcing one deck polishing layer.
3, method according to claim 1 and 2, the used ibuprofen amount of wherein every tablet is the 600-1200 milligram.
4, method according to claim 1 and 2, wherein bonding agent contains microcrystalline Cellulose and water soluble dyes derivant.
5, method according to claim 1 and 2, wherein Eudragit
E 30 D are used as acrylic resin.
6, method according to claim 1 and 2, wherein the sweller of cellulose, starch, starch ether, pectin or a similar effect is used as disintegrating agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2553/86 | 1986-06-25 | ||
| CH2553/86A CH669523A5 (en) | 1986-06-25 | 1986-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86108644A CN86108644A (en) | 1988-01-06 |
| CN1023191C true CN1023191C (en) | 1993-12-22 |
Family
ID=4236387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86108644A Expired - Fee Related CN1023191C (en) | 1986-06-25 | 1986-12-19 | Process for producing sustained release ibuprofen preparation |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US4867987A (en) |
| EP (1) | EP0250648B1 (en) |
| JP (1) | JPS635020A (en) |
| KR (1) | KR930008956B1 (en) |
| CN (1) | CN1023191C (en) |
| AT (1) | ATE66370T1 (en) |
| AU (1) | AU590370B2 (en) |
| CA (1) | CA1276560C (en) |
| CH (1) | CH669523A5 (en) |
| DE (1) | DE3681031D1 (en) |
| DK (1) | DK616186A (en) |
| ES (1) | ES2029228T3 (en) |
| FI (1) | FI88580C (en) |
| GR (1) | GR3002579T3 (en) |
| IL (1) | IL81045A (en) |
| NO (1) | NO173081C (en) |
| NZ (1) | NZ218734A (en) |
| ZA (1) | ZA869586B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8705083D0 (en) * | 1987-03-04 | 1987-04-08 | Euro Celtique Sa | Spheroids |
| US4970081A (en) * | 1989-01-03 | 1990-11-13 | Sterling Drug Inc. | Controlled-release, low-dose aspirin formulation and method of treating vascular occlusive disease therewith |
| US5213807A (en) * | 1990-05-03 | 1993-05-25 | Chemburkar Pramod B | Pharmaceutical composition containing ibuprofen and a prostaglandin |
| JPH04230625A (en) * | 1990-12-27 | 1992-08-19 | Standard Chem & Pharmaceut Corp Ltd | Method for production of finely dispersed tablet composition consisting of microcapsule containing sprayed and dried sodium dichlofenac and having enteric coating |
| US5605930A (en) * | 1991-10-21 | 1997-02-25 | The United States Of America As Represented By The Department Of Health And Human Services | Compositions and methods for treating and preventing pathologies including cancer |
| US5773031A (en) * | 1996-02-27 | 1998-06-30 | L. Perrigo Company | Acetaminophen sustained-release formulation |
| FR2766089B1 (en) * | 1997-07-21 | 2000-06-02 | Prographarm Lab | IMPROVED MULTIPARTICULAR TABLET WITH RAPID DELIVERY |
| AU2002217647A1 (en) * | 2000-11-28 | 2002-06-11 | Irina Alekseevna Komissarova | Pharmaceutical composition, the use thereof and method for producing said composition |
| EP2422773A3 (en) * | 2002-09-20 | 2012-04-18 | Alpharma, Inc. | Sequestering subunit and related compositions and methods |
| JP5393032B2 (en) * | 2005-02-04 | 2014-01-22 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Filter with added cigarette and cellulose flavors |
| DE102005037630A1 (en) | 2005-08-09 | 2007-02-15 | Glatt Gmbh | Process for the preparation of particles of pharmaceutical substances, particles of pharmaceutical substances and their use |
| CN101330904B (en) * | 2005-12-16 | 2012-04-18 | 韩美控股株式会社 | Solid dispersion comprising an active ingredient having a low melting point and tablet for oral administration comprising same |
| KR20140079441A (en) | 2006-06-19 | 2014-06-26 | 알파마 파머슈티컬스 엘엘씨 | Pharmaceutical compositions |
| EP2073797A2 (en) * | 2006-10-11 | 2009-07-01 | Alpharma, Inc. | Pharmaceutical compositions |
| US8623418B2 (en) | 2007-12-17 | 2014-01-07 | Alpharma Pharmaceuticals Llc | Pharmaceutical composition |
| CA2709905A1 (en) * | 2007-12-17 | 2009-06-25 | Alfred Liang | Abuse-resistant oxycodone composition |
| JP5953646B2 (en) * | 2009-11-24 | 2016-07-20 | 大正製薬株式会社 | Solid formulation containing ibuprofen |
| JP5819329B2 (en) * | 2010-03-09 | 2015-11-24 | アルカーメス ファーマ アイルランド リミテッド | Alcohol-resistant enteric pharmaceutical composition |
| CA2936748C (en) | 2014-10-31 | 2017-08-08 | Purdue Pharma | Methods and compositions particularly for treatment of attention deficit disorder |
| US10722473B2 (en) | 2018-11-19 | 2020-07-28 | Purdue Pharma L.P. | Methods and compositions particularly for treatment of attention deficit disorder |
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|---|---|---|---|---|
| DE1228757B (en) * | 1962-06-28 | 1966-11-17 | Haessle Ab | Process for the production of a coating on solid dosage forms which disintegrates rapidly in water and gastric juice |
| JPS51127041A (en) * | 1975-04-23 | 1976-11-05 | Toyama Chem Co Ltd | A process for preparing novel 2-( substituted phenyl) alkane acids and their salts. |
| US4447454A (en) * | 1977-04-01 | 1984-05-08 | The Upjohn Company | Analgetic compounds, compositions and process of treatment |
| DE2908794C2 (en) * | 1978-03-09 | 1984-09-13 | Japan Atomic Energy Research Institute, Tokio/Tokyo | Process for the production of a polymer preparation containing a physiologically active substance |
| JPS6028809B2 (en) * | 1979-08-21 | 1985-07-06 | 日本原子力研究所 | Method for producing ibuprofen sustained release composition |
| EP0052075A1 (en) * | 1980-11-12 | 1982-05-19 | Ciba-Geigy Ag | Sustained release pharmaceutical granule |
| IT1144911B (en) * | 1981-03-19 | 1986-10-29 | Pharmatec Spa | CONTROLLED RELEASE PHARMACEUTICAL COMPOSITION CONTAINING IBUPROFEN |
| US4713249A (en) * | 1981-11-12 | 1987-12-15 | Schroeder Ulf | Crystallized carbohydrate matrix for biologically active substances, a process of preparing said matrix, and the use thereof |
| DK150008C (en) * | 1981-11-20 | 1987-05-25 | Benzon As Alfred | PROCEDURE FOR THE PREPARATION OF A PHARMACEUTICAL ORAL POLYDEPOT PREPARATION |
| DE3205504C2 (en) * | 1982-02-16 | 1983-12-01 | Dolorgiet Gmbh & Co Kg, 5300 Bonn | Topical drug containing ibuprofen |
| US4587249A (en) * | 1982-07-22 | 1986-05-06 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
| GB2134786B (en) * | 1982-07-22 | 1986-05-08 | Richardson Vicks Inc | Improved analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
| US4486436A (en) * | 1982-07-22 | 1984-12-04 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
| GB2132887A (en) * | 1982-11-15 | 1984-07-18 | Procter & Gamble | Enteric-coated anti-inflammatory compositions |
| JPS59122425A (en) * | 1982-12-27 | 1984-07-14 | Kaken Pharmaceut Co Ltd | Sustained release preparation and its preparation |
| US4567183A (en) * | 1983-03-11 | 1986-01-28 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising xanthines and methods of using same |
| US4684516A (en) * | 1983-08-01 | 1987-08-04 | Alra Laboratories, Inc. | Sustained release tablets and method of making same |
| US4558051A (en) * | 1983-10-11 | 1985-12-10 | Richardson-Vicks, Inc. | Analgesic and anti-inflammatory compositions comprising xanthines and methods of using same |
| US4522826A (en) * | 1984-02-08 | 1985-06-11 | Richardson-Vicks Inc. | Analgesic and anti-inflammatory compositions comprising diphenhydramine and methods of using same |
| US4585783A (en) * | 1984-02-08 | 1986-04-29 | Richardson-Vicks, Inc. | Analgesic and anti-inflammatory compositions comprising diphenhydramine and methods of using same |
| DK62184D0 (en) * | 1984-02-10 | 1984-02-10 | Benzon As Alfred | DIFFUSION COATED POLYDEPOT PREPARATION |
| US4609675A (en) * | 1984-08-17 | 1986-09-02 | The Upjohn Company | Stable, high dose, high bulk density ibuprofen granulations for tablet and capsule manufacturing |
| IE58110B1 (en) * | 1984-10-30 | 1993-07-14 | Elan Corp Plc | Controlled release powder and process for its preparation |
| US4666705A (en) * | 1985-06-03 | 1987-05-19 | E. R. Squibb & Sons, Inc. | Controlled release formulation |
| GB8519310D0 (en) * | 1985-07-31 | 1985-09-04 | Zyma Sa | Granular active substances |
-
1986
- 1986-06-25 CH CH2553/86A patent/CH669523A5/de not_active IP Right Cessation
- 1986-12-16 AT AT86117458T patent/ATE66370T1/en not_active IP Right Cessation
- 1986-12-16 EP EP86117458A patent/EP0250648B1/en not_active Expired - Lifetime
- 1986-12-16 ES ES198686117458T patent/ES2029228T3/en not_active Expired - Lifetime
- 1986-12-16 DE DE8686117458T patent/DE3681031D1/en not_active Expired - Lifetime
- 1986-12-19 AU AU66807/86A patent/AU590370B2/en not_active Ceased
- 1986-12-19 DK DK616186A patent/DK616186A/en not_active Application Discontinuation
- 1986-12-19 KR KR1019860010971A patent/KR930008956B1/en not_active IP Right Cessation
- 1986-12-19 NZ NZ218734A patent/NZ218734A/en unknown
- 1986-12-19 ZA ZA869586A patent/ZA869586B/en unknown
- 1986-12-19 US US06/944,552 patent/US4867987A/en not_active Expired - Fee Related
- 1986-12-19 JP JP61303589A patent/JPS635020A/en active Pending
- 1986-12-19 IL IL81045A patent/IL81045A/en not_active IP Right Cessation
- 1986-12-19 CN CN86108644A patent/CN1023191C/en not_active Expired - Fee Related
- 1986-12-19 FI FI865227A patent/FI88580C/en not_active IP Right Cessation
- 1986-12-19 CA CA000525825A patent/CA1276560C/en not_active Expired - Fee Related
- 1986-12-19 NO NO865195A patent/NO173081C/en unknown
-
1991
- 1991-08-22 GR GR91401076T patent/GR3002579T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI865227A0 (en) | 1986-12-19 |
| NZ218734A (en) | 1990-03-27 |
| FI865227A (en) | 1987-12-26 |
| DE3681031D1 (en) | 1991-09-26 |
| NO173081B (en) | 1993-07-19 |
| ZA869586B (en) | 1988-07-27 |
| CH669523A5 (en) | 1989-03-31 |
| EP0250648A2 (en) | 1988-01-07 |
| NO865195L (en) | 1987-12-28 |
| CA1276560C (en) | 1990-11-20 |
| AU590370B2 (en) | 1989-11-02 |
| DK616186A (en) | 1987-12-26 |
| DK616186D0 (en) | 1986-12-19 |
| FI88580B (en) | 1993-02-26 |
| KR880000090A (en) | 1988-03-23 |
| ES2029228T3 (en) | 1992-08-01 |
| GR3002579T3 (en) | 1993-01-25 |
| KR930008956B1 (en) | 1993-09-17 |
| NO173081C (en) | 1993-10-27 |
| US4867987A (en) | 1989-09-19 |
| EP0250648B1 (en) | 1991-08-21 |
| EP0250648A3 (en) | 1988-03-23 |
| FI88580C (en) | 1993-06-10 |
| CN86108644A (en) | 1988-01-06 |
| JPS635020A (en) | 1988-01-11 |
| IL81045A0 (en) | 1987-03-31 |
| IL81045A (en) | 1990-11-05 |
| NO865195D0 (en) | 1986-12-19 |
| AU6680786A (en) | 1988-01-07 |
| ATE66370T1 (en) | 1991-09-15 |
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